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If an information system is to survive, the users must be satisfied that it meets their needs promptly and consistently. It is essential to react quickly to any undesired result such as an extemely high or low output, too low a relevance or recall, or both. The search editor should feel responsbile not only for the profile setup but also for its continual adjustment. To do this he must know: (1) the user's exact information need, (2) the user's relevance and recall and (3) the means to achieve the desired objectives. The COMPENDEX Profiling Guide (LI 002 115) provides guidelines for formulating profiles while this manual is designed for search editors and users who wish to adjust their profiles. The manual contains information concerning the user's exact information need, profile performance and user's preference, and the means to bring about the desired objectives such as how to: (1) increase relevance, (2) improve relevance and (3) increase recall. Additional information concerning evaluation of COMPENDEX (tape service of Engineering Index, Inc.) is contained in LI 002 114. (NH)